.index-container {
    padding: 40px;
    max-width: 1200px;
    margin: 0 auto;
    min-height: calc(100vh - 80px);
  }
  
  .welcome-title {
    text-align: center;
    color: #1d1d1f;
    margin-bottom: 40px;
    font-weight: 500;
  }
  
  .feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
  }
  
  .feature-card {
    padding: 20px;
    text-align: center;
    border-radius: 12px;
    transition: transform 0.3s ease;
  }

  .el-card.is-always-shadow {
    box-shadow: 14px 14px 10px 4px rgba(0, 0, 0, 0.11);
  }

  .feature-card:hover {
    transform: translateY(-5px);
  }
  
  .button-group {
    display: flex;
    gap: 12px;
    margin-top: 16px;
    justify-content: center; /* 新增：水平居中 */
  }
  
  /* 复用ChatPrivate的样式 */
  .user-list {
    width: 100%;
    background: white;
    padding: 8px 0;
  }
  
  .user-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 1px solid #f0f0f0;
  }
  
  .user-item:hover {
    background: #f5f7fa;
  }
  
  .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #007AFF, #00a8ff);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    font-weight: 500;
  }
  
  .username {
    font-size: 14px;
    color: #333;
    font-weight: 500;
  }
  
  .dark-mode .welcome-title {
    color: #ffffff;
  }
  
  .dark-mode .el-card {
    background-color: #717175;
    color: #ffffff;
    border: 1px solid #a19e9e;
  }

  .dark-mode .el-card.is-always-shadow {
    box-shadow: 14px 14px 10px 4px rgba(255, 253, 253, 0.11);
  }

  